Cord lock for venetian blinds



Sept. 10, 1940. D, Jv O ELO 2,214,155

CORD LOOK FOR VENETIAN BLINDS Filed Nov. 7, 1938 2 Sheets-Sheet l Sept. 10, 1940. D, AJQUELO 2,214,155

CORD LOCK FOR VENETIAN BLINDS Filed NOV. 7, 1938' Z Sheets-Sheet 2 Patented Sept. 10, 1940 2,214,155 com) LOCK FOR. VENET'IAN BLINDS Davis J. Ajouelo, Atlanta, Ga., assigncr to Armand May, Atlanta, Ga.

Application November 7,, 1938, Serial N 0. 239,388

3 Claims. (Cl. 15617) This invention relates to improvements in cord locks for Venetian blind constructions.

The primary object carry the trunnions 30, Trunnion 38B is supported in the bracket 33. At the exterior of of a bracket in which said roller 1s pivoted which the tilting cord 38 runs or extends If de .10

In this connection, the invention also contemsired, a leaf spring 40 may be provided to insure plates b k t or housing for support ng the retention of the tilting cord in the groove of pullockmg mechanism, which bracket or housing is y 1. so constructed that the lifting cord can be in- As is also customary, a pull cord looped at its 1 serted in a passage between the locking roller intermediate portion as. illustrated at 4| ex- 5 and the cooperating clamping wall of the bracket tends along the head and tilt rail 23 and dow by a sidewise or lateral movement of the cord Wardly through the slats 20 with its ends secured Thus, the lifting cord can be assembled without to the base rail for the purpose of permitting the the necessity of thread ng it endwise through the base rail and the slats to be raised and lowered 20 instrumentalities with which it isassociated or as desired h W i ht f the base rail and slats cooperates, is such that they normally tend to move down- With these and other objects in view, the in- Wardly by sravlty and, for i eason, it is necvention consists in certain details of construcessary that means e p ovided for locking or tion and combinations and arrangements of Clam-Ding d at n O d r hat the base rail t n as l here nafter be more fully and slats can be releasably positioned at the described and the novel features thereof particusired eleVaIlOn this purpose, at he end of larly pointed t in th appended 1 the head and tilt rail opposite the tilting mecha- In the accompanying drawings, illustrating msm previously described there is a bracket 42 the preferred embodiment of the present invenhOuSlIlg locking mechanlsm d having therein a bearing for the trunnion 3| Within this Figure 1 is a front elevational view of a blind, acket the P1111 d passes around a glllde the intermediate portions of the slats and rails Sleeve 43 rotatable on a pin 44 secured in tw cphaving been broken t; posite walls ,of the bracket Also pivoted In said Fig 2 is a sectional View on the line of bracket 18 a clamping roller 45 Roller 45 1s ro- Fig. tatable on a pin 46 the pm being disposed ec- Fig 3 is a Sectional View on line f centrically of the roller and the surface of the Fig. 2; roller 18 knurled or roughened so that, if the pull Fig 4 is a detail perspective View of the hous cord 4| is pressed against the surface of the ecihg or bracket with the hfhcorddockmg roller centrically mounted roller while the slats and pivoted therein; and head rail are being lowered, the frictional m Fig 5 is a man View of the blank from which gagement of the cord with the roller will rotate the bracket or housing for the locking mecha the latter with the result that the surface of the is formed roller will be advanced toward the wall 41 of the As usual, the blind consists of a number of f ultimately gripping the cord between slats 2B, suitably attached to suspension tapes 2|, Sam wan Its surface- In other Words the which in tum, are Secured to the base rail 22 roller 45, with its eccentric mounting, has a and the combined head and tilt rail 23. To Cammng action as the pull cord moves properly position the tapes 2| with respect to the Wardly dulmg downward movement of the base rail, a plate or clip 25 is provided, said plate havrail and Slats- If deslred the Wall 47 0f the 50 bracket, which cooperates with this cam roller 45, may take the form of a spring finger bent up somewhat from the wall proper of as more particularly shown in Figs.

This bracket for the locking mechanism and the head and tilt rail 23.

The combined head and tilt rail 23 is of a trunnion 3! is also stamped or formed-up from a single blank of metal, such as illustrated in Fig. 5. By bending the blank along lines C, in Fig. 5, the two opposite walls 42 42 are formed the wall 42 being slotted as at 48 to form a bearing for the trunnion 3i and the wall 42 being formed with apertures for attachment of the bracket to a clip by which it is mounted in the window opening. By bending the blank along the line D, the portion 42 forms a wall having apertures 49 therein for the pins 44, 46, and by bending the blank along the line E, the portion 42 is disposed opposite the bent-up portion 42, so that the openings 49 are arranged in registry or alinement with the holes 49 to receive pins 44, 46.

Referring particularly to Fig. 4, it will be noted that the wall 42 comprising the cord-engaging portion 41, terminates somewhat short of the wall 42 of the bracket 42, in which the lifting-cordlocking-cam roller is mounted. Thus, there is a slot formed between the extremities of these two walls or in one of the side walls of the bracket, through which the lifting cord can be inserted sidewise into the space in which it is normally disposed or between the eccentric cam roller '45 and the cord-engaging surface 41 of the wall. Here, again, endwise threading of the cord ends through the locking mechanism is eliminated in the same way that threading of the cord through the tilting mechanism is obviated.

What I claim is:

1. In a lock mechanism for cords, a housing, a cam member supported in said housing, there being a cord passage between the surface of the cam and a wall of the housing, said cam being movable toward said wall to press cords in the passage toward the wall, and means on said wall yieldingly resisting the cords pressed against the same by the cam.

2. In a lock mechanism for cords, a housing, a cam member supported in the housing, there being a cord passage between the cam and one wall of the housing, and a spring member formed on said wall engageable with a cord in said passage.

3. In a lock mechanism for cords, a housing, a cam member supported in the housing, there being a cord passage between the cam and one wall of the housing, and a spring on said wall engageable with a cord in said passage, there being an entrance opening between said wall and an adjacent wall of the housing for the lateral insertion and removal of a cord into and out of said passage.

DAVIS J. AJOUELO. 

